A tool for disassembling and assembling the spring of an ultra-high pressure ground safety valve driver

Abstract

The utility model discloses a tool for dismounting and assembling the spring of superhigh pressure ground safety valve driver, including operating hydraulic cylinder, piston, position indicating rod and safety valve shell, the piston fixed mounting is in the inside of operating hydraulic cylinder, indicating rod wear -resisting ring is fixedly installed above the inside of operating hydraulic cylinder, indicating rod sealing piece is arranged above the inside of operating hydraulic cylinder and below indicating rod wear -resisting ring, and piston inside wear -resisting ring and piston outer wear -resisting ring are fixedly installed below the inside of operating hydraulic cylinder. The utility model discloses in the process of actual use, when needing to carry out initial pre -pressing to spring, can pass through hydraulic drive piston, and the spring force required for spring pre -pressing is given, then is again tightened connecting device. Compared with the direct tightening mode of traditional adoption thread, the stress of hydraulic operation is more uniform, and the risk of releasing spring force and causing injury due to the broken tooth of thread is reduced.

Description

Technical Field

[0001] This utility model relates to the field of surface safety valve technology in oil drilling and production, specifically a tool for disassembling and assembling the actuator spring of an ultra-high pressure surface safety valve. Background Technology

[0002] Surface safety valves are an essential part of oil drilling and production. In case of emergencies such as fire or excessive pressure in the well, the surface safety valve can quickly close the wellhead by releasing the pressure in the actuator cylinder and using the spring force.

[0003] In existing technologies, as drilling deepens, the pressure specifications of surface safety valves are constantly increasing. To ensure the reliability and speed of shut-off, large springs are commonly used in ultra-high pressure surface safety valves. The high elasticity of these large springs makes it difficult to disassemble the surface safety valves on-site using conventional methods, and conventional disassembly methods also carry significant risks. To address this technical problem, this invention proposes a tool for disassembling and assembling the actuator spring of an ultra-high pressure surface safety valve. Utility Model Content

[0004] In existing technologies, as drilling deepens, the pressure specifications of surface safety valves are constantly increasing. To ensure the reliability and speed of shut-off, large springs are commonly used in ultra-high pressure surface safety valves. The high elasticity of these large springs makes it difficult to disassemble the surface safety valves on-site using conventional methods, and conventional disassembly methods also carry significant risks. To address this technical problem, this invention proposes a tool for disassembling and assembling the actuator spring of an ultra-high pressure surface safety valve.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A tool for disassembling and assembling the actuator spring of an ultra-high pressure ground safety valve, comprising an operating hydraulic cylinder, a piston, a position indicator rod, and a safety valve housing. The piston is fixedly installed inside the operating hydraulic cylinder. A wear-resistant ring for the indicator rod is fixedly installed above the inside of the operating hydraulic cylinder. An indicator rod seal is provided above the inside of the operating hydraulic cylinder and below the wear-resistant ring for the indicator rod. Simultaneously, an inner wear-resistant ring and an outer wear-resistant ring for the piston are fixedly installed inside the lower part of the operating hydraulic cylinder. An inner piston seal is provided below the inside of the operating hydraulic cylinder and above the inner wear-resistant ring for the piston, and an outer piston seal is provided inside the inner piston seal. The lower part of the position indicator rod is threadedly connected to the piston.

[0006] Preferably, the outer surface of the bottom end of the position indicator rod is provided with a lower thread, which corresponds to and is threadedly connected to the piston.

[0007] Preferably, the outer wall of the position indicator rod is provided with an adjusting sleeve, the top end of the position indicator rod is provided with an upper thread, the top end of the position indicator rod is connected to a position indicator nut, and the adjusting sleeve is located outside the operating hydraulic cylinder.

[0008] Preferably, the operating hydraulic cylinder has external threads and a hydraulic operating port for connection to a ground safety valve.

[0009] Preferably, a spring is fixedly installed inside the safety valve housing, and a connecting device is provided inside the safety valve housing.

[0010] Preferably, a tool is provided on the outside of the operating hydraulic cylinder, and the tool corresponds to the connecting device.

[0011] This utility model provides a tool for disassembling and assembling the actuator spring of an ultra-high pressure ground safety valve. It has the following beneficial effects: (1) When it is necessary to apply initial preload to the spring, the spring force required can be applied by hydraulically driving the piston, and then the connecting device can be tightened. Compared with the traditional method of directly tightening by thread, hydraulic operation provides more uniform force and reduces the risk of injury caused by spring force release due to broken threads.

[0012] (2) When the spring needs to be released during disassembly, the spring force can be transferred to the piston by hydraulically driving the piston. Then, the connecting device can be loosened and the pressure can be released slowly so that the piston can slowly release the spring force under the action of the spring force, thereby reducing the risk of injury from the release of the spring force.

[0013] (3) Use the position indicator rod to confirm the position status of the tool, which is convenient for on-site observation and judgment.

[0014] (4) By using the indicator nut and adjusting sleeve, the effective stroke of the entire tool is limited to prevent hydraulic overload from damaging the spring or other parts. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall side sectional structure of this utility model; Figure 3 This is a schematic diagram of the initial pre-compression structure of this utility model; Figure 4 This is a schematic diagram of the internal structure of the safety valve housing of this utility model; Figure 5 This is a schematic diagram of the external structure of the tool of this utility model; Figure 6 This is a schematic diagram of the elastic release principle structure of this utility model.

[0016] In the diagram: 1. Operating hydraulic cylinder; 2. Piston; 3. Position indicator rod; 301. Lower thread; 302. Upper thread; 4. Adjusting sleeve; 5. Position indicator nut; 6. Indicator rod wear ring; 7. Indicator rod seal; 8. Piston inner seal; 9. Piston outer seal; 10. Piston inner wear ring; 101. Thread; 102. Hydraulic operating port; 11. Piston outer wear ring; 12. Spring; 13. Connecting device; 14. Safety valve housing; 15. Tool. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0018] Please see Figure 1-6 This utility model provides a technical solution: Example 1: A tool for disassembling and assembling the actuator spring of an ultra-high pressure ground safety valve includes an operating hydraulic cylinder 1, a piston 2, a position indicator rod 3, and a safety valve housing 14. The piston 2 is fixedly installed inside the operating hydraulic cylinder 1. A wear-resistant ring 6 for the indicator rod is fixedly installed on the upper part of the operating hydraulic cylinder 1. An indicator rod seal 7 is provided on the upper part of the operating hydraulic cylinder 1 and below the wear-resistant ring 6. At the same time, an inner wear-resistant ring 10 and an outer wear-resistant ring 11 for the piston are fixedly installed on the lower part of the operating hydraulic cylinder 1. An inner piston seal 8 is provided on the lower part of the operating hydraulic cylinder 1 and above the inner wear-resistant ring 10. An outer piston seal 9 is provided inside the inner piston seal 8. The lower thread 301 of the position indicator rod 3 is connected to the piston 2.

[0019] Example 2: The bottom outer surface of the position indicator rod 3 is provided with a lower thread 301, which corresponds to and is threadedly connected to the piston 2; Example 3: An adjusting sleeve 4 is provided on the outer wall of the position indicator rod 3, an upper thread 302 is provided on the top of the position indicator rod 3, a position indicator nut 5 is connected to the top of the position indicator rod 3, and the adjusting sleeve 4 is located outside the operating hydraulic cylinder 1; Example 4: The hydraulic cylinder 1 has a thread 101 for connecting to a ground safety valve and a hydraulic operating port 102 on its exterior; Example 5: A spring 12 is fixedly installed inside the safety valve housing 14, and a connecting device 13 is provided inside the safety valve housing 14; Example 6: A tool 15 is provided on the outside of the hydraulic cylinder 1, and the tool 15 corresponds to the connecting device 13.

[0020] The working principle is as follows: When disassembling spring 12 and needing to release the spring force, first adjust the indicator nut 5 to adjust the distance between the indicator nut 5 and the adjusting sleeve 4 to the spring pre-compression distance; then pressurize through the hydraulic operating port 102 to hydraulically drive piston 2 to the maximum position; screw this device into the ground safety valve housing 14 through the thread 101; loosen the adjusting indicator nut 5 and back it back 3-5mm; pressurize through the hydraulic operating port 102 to drive the hydraulically driven piston 2, transferring the force of spring 12 to piston 2; then completely loosen the connecting device 13 through tool 15; slowly release pressure through the hydraulic operating port 102, allowing piston 2 to slowly release the spring force under the action of spring 12, reducing the risk of injury from spring force release.

[0021] All electrical components mentioned in this article are electrically connected to the controller and power supply. The control method of this utility model is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail (motor model: 39BYG001; electric actuator model: XTL100-500-24).

[0022] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A tool for disassembling and assembling the actuator spring of an ultra-high pressure ground safety valve, characterized in that: The device includes an operating hydraulic cylinder (1), a piston (2), a position indicator rod (3), and a safety valve housing (14). The piston (2) is fixedly installed inside the operating hydraulic cylinder (1). A wear-resistant ring (6) for the indicator rod is fixedly installed on the upper part of the operating hydraulic cylinder (1). An indicator rod seal (7) is provided on the upper part of the operating hydraulic cylinder (1) and below the wear-resistant ring (6). At the same time, an inner wear-resistant ring (10) and an outer wear-resistant ring (11) for the piston are fixedly installed on the lower part of the operating hydraulic cylinder (1). An inner piston seal (8) is provided on the lower part of the operating hydraulic cylinder (1) and above the inner wear-resistant ring (10). An outer piston seal (9) is provided inside the inner piston seal (8). The lower thread (301) of the position indicator rod (3) is connected to the piston (2).

2. The tool for disassembling and assembling the actuator spring of an ultra-high pressure ground safety valve according to claim 1, characterized in that: The position indicator rod (3) has a lower thread (301) on its bottom outer surface, and the lower thread (301) corresponds to and is threadedly connected to the piston (2).

3. A tool for disassembling and assembling the actuator spring of an ultra-high pressure ground safety valve according to claim 2, characterized in that: An adjusting sleeve (4) is provided on the outer wall of the position indicator rod (3), an upper thread (302) is provided on the top of the position indicator rod (3), a position indicator nut (5) is connected to the top of the position indicator rod (3), and the adjusting sleeve (4) is located outside the operating hydraulic cylinder (1).

4. A tool for disassembling and assembling an ultra-high pressure ground safety valve actuator spring according to claim 3, characterized in that: The operating hydraulic cylinder (1) has a thread (101) for connecting to the ground safety valve and a hydraulic operating port (102).

5. A tool for disassembling and assembling an ultra-high pressure ground safety valve actuator spring according to claim 4, characterized in that: A spring (12) is fixedly installed inside the safety valve housing (14), and a connecting device (13) is provided inside the safety valve housing (14).

6. A tool for disassembling and assembling an ultra-high pressure ground safety valve actuator spring according to claim 5, characterized in that: The operating hydraulic cylinder (1) is provided with a tool (15) on its exterior, and the tool (15) corresponds to the connecting device (13).

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